Question

Not everyone has realized what_______ important part the balance of________ nature plays in their life.

A．an；the

B．/；the

C．an；/

D．the；/

Answer

C

【解析】

试题分析：考查冠词及短语的用法。第二空nature“自然”时前面不需用冠词，类似的还有space“太空”；man“人类”。第一空是play an important part in their life短语，用了what引导的感叹句，正常语序应是the balance of nature plays an important part in their life，被感叹的是名词part所以用what来引导，故选C。用how来感叹形容词或副词。

考点：考查冠词、感叹句及短语的用法。